David S Maas, MD
Hospice/Palliative Care · San Jose
- Medicare standing
- Clear
- Enrolled, allowed to bill and order, not excluded
- Plans that list them
- 23
- 6 carriers
- Office
- 1
Offices
1 location · County of Santa Clara · 1,000 clinicians in this group
Looking this up.
Hospitals listed: Santa Clara Valley Medical Center. That is not proof they admit you there this week.
Plans that list them
23 plans · 6 carriers
A missing listing does not mean out of network. Directories change, and a listing does not cover every office. Call Dr. Maas’s office at (408) 885-5000 to confirm they take your plan. Ask about the office you use, its medical group, referrals and appointments.
23 of 23 plans
| Alignment Health BreathEasy (HMO C-SNP) | Alignment Health Plan | Listed | Oct 3, 2026 |
| Alignment Health Clarity (HMO C-SNP) | Alignment Health Plan | Listed | Oct 3, 2026 |
| Alignment Health Harmony (HMO) | Alignment Health Plan | Listed | Oct 3, 2026 |
| Alignment Health Heart & Diabetes (HMO C-SNP) | Alignment Health Plan | Listed | Oct 3, 2026 |
| Alignment Health Heart & Diabetes CalPlus (HMO C-SNP) | Alignment Health Plan | Listed | Oct 3, 2026 |
| Alignment Health Heart & Diabetes Care (HMO C-SNP) | Alignment Health Plan | Listed | Sep 28, 2026 |
| Alignment Health Heart & Diabetes Choice (HMO C-SNP) | Alignment Health Plan | Listed | Sep 28, 2026 |
| Alignment Health Honor+ Plan (HMO) | Alignment Health Plan | Listed | Oct 3, 2026 |
| Alignment Health My Choice CalCare (HMO) | Alignment Health Plan | Listed | Oct 3, 2026 |
| Alignment Health Silicon (HMO C-SNP) | Alignment Health Plan | Listed | Oct 3, 2026 |
| Alignment Health smartHMO (HMO) | Alignment Health Plan | Listed | Oct 3, 2026 |
| Alignment Health the ONE (HMO) | Alignment Health Plan | Listed | Oct 3, 2026 |
| Anthem Full Dual Advantage Aligned (HMO D-SNP) | Anthem Blue Cross | Listed | Oct 3, 2026 |
| Anthem Medicare Advantage (HMO-POS) | Anthem Blue Cross | Listed | Oct 3, 2026 |
| Anthem Prime (HMO-POS) | Anthem Blue Cross Partnership Plan | Listed | Oct 3, 2026 |
| Central Health Classic Care Plan III (HMO) | Central Health Medicare Plan | Listed | Aug 15, 2026 |
| Central Health Dual Access Plan (HMO D-SNP) | Central Health Medicare Plan | Listed | Aug 15, 2026 |
| Central Health Embrace Choice Plan (HMO C-SNP) | Central Health Medicare Plan | Listed | Aug 15, 2026 |
| Central Health Valor Care Plan (HMO) | Central Health Medicare Plan | Listed | Aug 15, 2026 |
| Imperial Courage Plan (HMO) | Imperial Health Plan of California, Inc. | Listed | Sep 1, 2026 |
| Imperial Dynamic Plan (HMO) | Imperial Health Plan of California, Inc. | Listed | Sep 1, 2026 |
| Imperial Senior Value (HMO C-SNP) | Imperial Health Plan of California, Inc. | Listed | Sep 1, 2026 |
| DualConnect (HMO D-SNP) | Santa Clara Family Health Plan | Listed | Sep 1, 2026 |
Hospitals they work in
1 hospital
These rate the hospital, not this clinician. Most measures at most hospitals are no different from the national rate.
- Santa Clara Valley Medical CenterSan Jose, CAAcute Care Hospital · Government - Local · Has an emergency department · Birthing-friendlyPart of Santa Clara Valley Health and Hospital System, which runs 3 hospitalsPatients rate it 3 of 5 · 70% would definitely recommend itOverall rating: 2 of 5 starsWorse than the national rate — SSI - Colon Surgery: 2.572, Oct 2024 – Sep 2025Better than the national rate — Central Line Associated Bloodstream Infection (ICU + select Wards): 0.563, Oct 2024 – Sep 2025Better than the national rate — Clostridium Difficile (C.Diff): 0.256, Oct 2024 – Sep 2025Better than the national rate — MRSA Bacteremia: 0.369, Oct 2024 – Sep 2025
See every measure and the patient survey for Santa Clara Valley Medical Center
Behind the star rating — Deaths: 2 better, 6 the same, 0 worse of 8 measures. Safety: 2 better, 5 the same, 1 worse of 8 measures. Readmissions: 0 better, 10 the same, 1 worse of 11 measures. The star rating is worked out from an earlier period than the measures below, so the two can disagree.
| SSI - Colon SurgeryInfections | 2.572 | Worse | Oct 2024 – Sep 2025 |
| Central Line Associated Bloodstream Infection (ICU + select Wards)Infections | 0.563 | Better | Oct 2024 – Sep 2025 |
| Clostridium Difficile (C.Diff)Infections | 0.256 | Better | Oct 2024 – Sep 2025 |
| MRSA BacteremiaInfections | 0.369 | Better | Oct 2024 – Sep 2025 |
| Abdominopelvic accidental puncture or laceration rateComplications and deaths | 1.25 (0.3 to 2.2) · 1,535 cases | No different | Jul 2022 – Jun 2024 |
| CMS Medicare PSI 90: Patient safety and adverse events compositeComplications and deaths | 1.07 (0.76 to 1.38) | No different | Jul 2022 – Jun 2024 |
| Death rate among surgical inpatients with serious treatable complicationsComplications and deaths | 214.59 (167.38 to 261.8) · 108 cases | No different | Jul 2022 – Jun 2024 |
| Death rate for CABG surgery patientsComplications and deaths | 2.8 · 41 cases | None | Jul 2022 – Jun 2025 |
| Death rate for COPD patientsComplications and deaths | 6 · 141 cases | None | Jul 2022 – Jun 2025 |
| Death rate for heart attack patientsComplications and deaths | 10.2 · 124 cases | None | Jul 2022 – Jun 2025 |
| Death rate for heart failure patientsComplications and deaths | 8.3 · 501 cases | None | Jul 2022 – Jun 2025 |
| Death rate for pneumonia patientsComplications and deaths | 14.9 · 653 cases | None | Jul 2022 – Jun 2025 |
| Death rate for stroke patientsComplications and deaths | 10.1 · 348 cases | None | Jul 2023 – Jun 2025 |
| Hybrid Hospital-Wide All-Cause Risk Standardized Mortality RateComplications and deaths | 3 · 4,502 cases | None | Jul 2024 – Jun 2025 |
| Iatrogenic pneumothorax rateComplications and deaths | 0.24 (0.04 to 0.43) · 9,014 cases | No different | Jul 2022 – Jun 2024 |
| In-hospital fall-associated fracture rateComplications and deaths | 0.34 (0.15 to 0.52) · 9,216 cases | No different | Jul 2022 – Jun 2024 |
| Perioperative pulmonary embolism or deep vein thrombosis rateComplications and deaths | 4.54 (2.51 to 6.58) · 1,421 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative acute kidney injury requiring dialysis rateComplications and deaths | 1.54 (0 to 3.2) · 288 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative hemorrhage or hematoma rateComplications and deaths | 2.11 (0.66 to 3.56) · 1,446 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative respiratory failure rateComplications and deaths | 11.61 (4.09 to 19.14) · 294 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative sepsis rateComplications and deaths | 7.29 (3.39 to 11.2) · 299 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative wound dehiscence rateComplications and deaths | 1.9 (0.45 to 3.36) · 333 cases | No different | Jul 2022 – Jun 2024 |
| Pressure ulcer rateComplications and deaths | 0.23 (0 to 0.78) · 7,538 cases | No different | Jul 2022 – Jun 2024 |
| Rate of complications for hip/knee replacement patientsComplications and deaths | 5.4 · 94 cases | None | Apr 2023 – Mar 2025 |
| Catheter Associated Urinary Tract Infections (ICU + select Wards)Infections | 0.735 | No different | Oct 2024 – Sep 2025 |
| SSI - Abdominal HysterectomyInfections | 2.573 | No different | Oct 2024 – Sep 2025 |
| Acute Myocardial Infarction (AMI) 30-Day Readmission RateUnplanned return visits | 14.6 · 185 cases | None | Jul 2023 – Jun 2025 |
| Heart failure (HF) 30-Day Readmission RateUnplanned return visits | 22.1 · 951 cases | None | Jul 2023 – Jun 2025 |
| Hospital return days for heart attack patientsUnplanned return visits | 56.3 · 128 cases | None | Jul 2022 – Jun 2025 |
| Hospital return days for heart failure patientsUnplanned return visits | 6.4 · 644 cases | None | Jul 2022 – Jun 2025 |
| Hospital return days for pneumonia patientsUnplanned return visits | 1.3 · 699 cases | None | Jul 2022 – Jun 2025 |
| Pneumonia (PN) 30-Day Readmission RateUnplanned return visits | 16.3 · 921 cases | None | Jul 2023 – Jun 2025 |
| Rate of emergency department (ED) visits for patients receiving outpatient chemotherapyUnplanned return visits | 5.7 (3.9 to 8.1) · 226 cases | No different | Jan 2024 – Dec 2024 |
| Rate of inpatient admissions for patients receiving outpatient chemotherapyUnplanned return visits | 12.6 (9.4 to 16.5) · 226 cases | No different | Jan 2024 – Dec 2024 |
| Rate of readmission after hip/knee replacementUnplanned return visits | 5.4 · 94 cases | None | Jul 2023 – Jun 2025 |
| Rate of readmission for CABGUnplanned return visits | 11.4 · 54 cases | None | Jul 2023 – Jun 2025 |
| Rate of readmission for chronic obstructive pulmonary disease (COPD) patientsUnplanned return visits | 20.3 · 242 cases | None | Jul 2023 – Jun 2025 |
| Rate of unplanned hospital visits after colonoscopy (per 1,000 colonoscopies)Unplanned return visits | 13.2 (9.9 to 17.4) · 702 cases | No different | Jan 2022 – Dec 2024 |
| Ratio of unplanned hospital visits after hospital outpatient surgeryUnplanned return visits | 1 (0.7 to 1.4) · 195 cases | No different | Jan 2024 – Dec 2024 |
What patients said (4,032 patients answered, 29% of those asked)
| Cleanliness | 3 |
| Nurse communication | 3 |
| Doctor communication | 3 |
| Communication about medicines | 3 |
| Discharge information | 2 |
| Overall hospital rating | 3 |
| Quietness | 2 |
| Recommend hospital | 4 |
| Room was "always" clean | 70% |
| Nurses "always" communicated well | 73% |
| Doctors "always" communicated well | 76% |
| Staff "always" explained | 57% |
| Yes, staff "did" give patients this information | 82% |
| Yes, staff "did" give patients information about help after discharge | 82% |
| Doctors "always" explained things so they could understand | 71% |
| Doctors "always" listened carefully | 74% |
| Doctors "always" treated them with courtesy and respect | 82% |
| Patients who gave a rating of "9" or "10" (high) | 67% |
| Staff "always" explained new medications | 71% |
| Nurses "always" explained things so they could understand | 71% |
| Nurses "always" listened carefully | 69% |
| Nurses "always" treated them with courtesy and respect | 80% |
| "Always" quiet at night | 43% |
| "YES", patients would definitely recommend the hospital | 70% |
| Staff "always" explained possible side effects | 44% |
| Yes, staff "did" give patients information about possible symptoms | 83% |
Original Medicare doctor bills
$15,678
Medicare paid this office $15,678 for 105 people.
This is what Medicare paid the clinician — not Medicare Advantage, and not the pharmacy.
| New patient visit (60+ min) | 24 | $3,904 | $163 |
| Short return visit (20+ min) | 35 | $3,085 | $53 |
| Initial hospital care with straightforward or low level of medical decision making, per day at least 40 minutes | 29 | $2,624 | $73 |
| Initial hospital care with straightforward or low-level medical decision making at least 55 minutes | 15 | $1,742 | $116 |
| Return visit (30+ min) | 17 | $1,484 | $82 |
See all 6 services
| New patient visit (60+ min) | 24 | $3,904 | $163 |
| Short return visit (20+ min) | 35 | $3,085 | $53 |
| Initial hospital care with straightforward or low level of medical decision making, per day at least 40 minutes | 29 | $2,624 | $73 |
| Initial hospital care with straightforward or low-level medical decision making at least 55 minutes | 15 | $1,742 | $116 |
| Return visit (30+ min) | 17 | $1,484 | $82 |
| Short return visit | 19 | $821 | $29 |
Who their Medicare patients are
105 Original Medicare patients in 2024. Average age 73 · Under 65 11% · 85 and older 15% · Women 46% · Also on Medicaid 76% · Health risk score 3.82. Sicker patients than 9 in 10 peers; the typical hospice and palliative care clinician is at 2.98.
Conditions among them: High blood pressure 74% · Cancer 50% · Diabetes 43% · Heart failure 32% · Chronic kidney disease 31% · COPD 30% · Atrial fibrillation 30% · Coronary heart disease 28% · Depression 26% · Stroke 20% · Dementia 17%.
The office billed $107,951, Medicare allowed $20,522 and paid $15,678; for 207 services of 14 kinds.
Original Medicare patients only. A risk score of 1.0 is the average Medicare patient; higher means sicker. Any count under 11 is hidden.
Year by year
| 2024 | 105 | 207 | 73 | 3.82 | $107,951 | $15,678 |
| 2023 | 102 | 224 | 73 | 2.87 | $115,482 | $18,608 |
| 2022 | 25 | 30 | 70 | 1.85 | $18,499 | $2,309 |
Original Medicare only. A service billed for fewer than 11 people in a year is hidden, so the lines can add up to less than the year's total.
See the services billed each year
2023: 8 services
| Initial hospital care with straightforward or low level of medical decision making, per day at least 40 minutes | 36 | $3,860 | $74 |
| Return visit (30+ min) | 26 | $2,883 | $82 |
| Telephone medical discussion with physician, 21-30 minutes | 18 | $2,113 | $85 |
| Long return visit (40+ min) | 14 | $1,819 | $130 |
| New patient visit (60+ min) | 11 | $1,795 | $163 |
| Initial hospital care with straightforward or low-level medical decision making at least 55 minutes | 15 | $1,753 | $117 |
| Short return visit (20+ min) | 21 | $1,708 | $53 |
| Telephone medical discussion with physician, 11-20 minutes | 11 | $894 | $60 |
Medicaid work
$461 in 2024
Medicaid paid $461 for 683 billed services this clinician did in 2024, up to 37 people in a month for one service.
Medicaid and CHIP claims where this clinician did the service, fee-for-service and managed care together. Any month with fewer than 11 patients is hidden, so small Medicaid practices undercount.
| OFFICE/OP CONSLTJ NEW/EST PT LOW MDM 30 MINUTES | 54 | $330 |
| Short return visit (20+ min) | 13 | $70 |
| OFF/OP CONSLTJ NEW/EST SF 20 | 53 | $61 |
| Medication list documented in medical record (COA) | 244 | $0 |
| Review of all medications by a prescribing practitioner or clinical pharmacist (such as, prescriptions, OTCs, herbal therapies and supplements) documented in the medical record (COA) | 226 | $0 |
| Most recent systolic blood pressure less than 130 mm Hg (DM) (HTN, CKD, CAD) | 53 | $0 |
| Most recent diastolic blood pressure less than 80 mm Hg (HTN, CKD, CAD) (DM) | 40 | $0 |
| 2024 | 683 | 7 | 37 | $461 |
| 2023 | 169 | 3 | 21 | $258 |
See the largest Medicaid services in earlier years
2023
| Short return visit (20+ min) | 114 | $169 |
| Return visit (30+ min) | 41 | $88 |
| Most recent hemoglobin A1c (HbA1c) level less than 7.0% (DM) | 14 | $0 |
Drugs they prescribed that Part D paid
$20,021
Pharmacies billed $20,021 in 2024.
This is pharmacy cost, not the office bill, and not what patients paid.
Opioids were 35% of their Part D prescriptions (187 of 528) in 2024. At or below the middle of the specialty; the typical hospice and palliative care clinician is at 43%. Long-acting opioids: 35% of their opioid prescriptions.
481 generic and 47 brand-name prescriptions · $20,021 in drug cost.
Part D prescriptions only. The opioid rate is opioid prescriptions as a share of all this clinician's Part D prescriptions; surgeons and pain specialists run higher than others, so it is shown against the same specialty.
| Lidocaine | 25 | $2,311 | $92 |
| Oxycodone | 54 | $923 | $17 |
| Hydrocodone-Acetaminophen | 50 | $707 | $14 |
| Methadone | 48 | $593 | $12 |
| Gabapentin | 77 | $446 | $6 |
See all 10 drugs
| Lidocaine | 25 | $2,311 | $92 |
| Oxycodone | 54 | $923 | $17 |
| Hydrocodone-Acetaminophen | 50 | $707 | $14 |
| Methadone | 48 | $593 | $12 |
| Gabapentin | 77 | $446 | $6 |
| Morphine Sulfate | 13 | $275 | $21 |
| Diclofenac | 20 | $219 | $11 |
| Morphine Sulfate Er | 18 | $191 | $11 |
| Trazodone | 17 | $86 | $5 |
| Naproxen | 15 | $85 | $6 |
Year by year
| 2024 | 528 | 64 | 35% (187) | 9% | $20,021 |
| 2023 | 333 | 57 | 40% (133) | 11% | $13,291 |
| 2022 | 116 | 32 | 58% (67) | 13% | $8,000 |
| 2021 | 222 | 40 | None | None | $35,317 |
| 2020 | 336 | 59 | None | None | $70,796 |
| 2019 | 150 | 35 | 0% (0) | None | $9,968 |
| 2018 | 30 | 11 | 0% (0) | None | $1,696 |
Part D prescriptions only. A drug prescribed to fewer than 11 people in a year is hidden.
See the drugs prescribed each year
2023: 6 drugs
| Dronabinol | 28 | $3,917 | $140 |
| Hydrocodone-Acetaminophen | 32 | $922 | $29 |
| Oxycodone | 35 | $682 | $19 |
| Methadone | 34 | $449 | $13 |
| Gabapentin | 30 | $447 | $15 |
| Mirtazapine | 19 | $292 | $15 |
2022: 3 drugs
| Hydrocodone-Acetaminophen | 13 | $592 | $46 |
| Morphine Sulfate Er | 11 | $318 | $29 |
| Oxycodone | 15 | $246 | $16 |
2021: 5 drugs
| Januvia | 11 | $12,068 | $1,097 |
| Atorvastatin | 17 | $228 | $13 |
| Carvedilol | 14 | $155 | $11 |
| Metformin | 22 | $149 | $7 |
| Lisinopril | 12 | $41 | $3 |
2020: 9 drugs
| Levothyroxine | 14 | $237 | $17 |
| Atorvastatin | 24 | $218 | $9 |
| Gabapentin | 14 | $183 | $13 |
| Metformin | 19 | $141 | $7 |
| Lisinopril | 19 | $137 | $7 |
| Losartan | 11 | $131 | $12 |
| Pantoprazole | 11 | $119 | $11 |
| Carvedilol | 13 | $107 | $8 |
| Amlodipine Besylate | 18 | $91 | $5 |
2019: 2 drugs
| Gabapentin | 11 | $138 | $13 |
| Atorvastatin | 11 | $110 | $10 |
Checkups this office reported
Medicare did not publish checkup rates for this clinician.
- Medicare’s overall office score
- 80.6 / 100
- Scores the office’s reporting and systems. It is not a grade for how the doctor treats you.
Professional record
- NPI
- 1538653688
- Trained
- Creighton University School of Medicine, 2018
- Video visits
- Lists video visits
- Gender
- Male
More record details
- Sole proprietor
- No
- Taxonomy
- Student in a training program (390200000X)
- Mailing address
- 2449 Mohawk St Apt 4, Pasadena, CA, 91107
- NPI first listed
- 2018-06-20
- NPI last updated
- 2018-06-20
This is when the NPI record was last certified, not a medical board exam.